--- product_id: 244511537 title: "Double-Sleeve Fabric Holder for 49% RH | 2-Way Humidity Control for Large Instruments" price: "¥5321" currency: JPY in_stock: true reviews_count: 13 url: https://www.desertcart.jp/products/244511537-double-sleeve-fabric-holder-for-49-rh-2-way-humidity store_origin: JP region: Japan --- # Holds 2 x 49% RH packs 2-way humidity control Leak-resistant fabric barrier Double-Sleeve Fabric Holder for 49% RH | 2-Way Humidity Control for Large Instruments **Price:** ¥5321 **Availability:** ✅ In Stock ## Summary > 🎶 Keep your strings and wood in perfect harmony—humidity control that hits all the right notes! ## Quick Answers - **What is this?** Double-Sleeve Fabric Holder for 49% RH | 2-Way Humidity Control for Large Instruments - **How much does it cost?** ¥5321 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/244511537-double-sleeve-fabric-holder-for-49-rh-2-way-humidity) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual-Pack Precision:** Securely holds two 49% RH Boveda Size 70 packs for optimal 45-55% humidity balance. - • **Protective Leak Barrier:** Fabric holder prevents moisture leaks, extending pack life and safeguarding your instrument. - • **Trusted by Pros & Retailers:** Preferred by music shops and repair experts for reliable, hassle-free instrument care. - • **Maintenance-Free Humidity Control:** Ditch sponges and hoses—automatic 2-way humidity regulation keeps wood stable without fuss. - • **Universal Fit for Large Instruments:** Designed for acoustic guitars, basses, violoncellos, and large woodwinds—perfect for multi-instrument pros. ## Overview The Double-Sleeve Fabric Holder is engineered to hold two 49% RH Boveda Size 70 humidity packs, delivering precise 2-way humidity control between 45% and 55% RH. Designed for large wooden instruments like acoustic guitars, basses, and woodwinds, it drapes safely over strings and into sound holes while providing a leak-resistant barrier that extends pack life. Ideal for musicians managing multiple instruments and trusted by retailers, this holder ensures maintenance-free, automatic humidity regulation to protect valuable wood from warping and damage. ## Description Product description Where to Start Large Starter Kit Guitars and Bass Ukulele and Mandolin Large Bowed Inst. Small Bowed Inst. Large Woodwind Small Woodwind Woodwind Reeds Learn More Large Starter Kit Guitars and Bass Ukulele and Mandolin Large Bowed Inst. Small Bowed Inst. Large Woodwind Small Woodwind Woodwind Reeds Small Starter Kit Guitars and Bass Ukulele and Mandolin Large Bowed Inst. Small Bowed Inst. Large Woodwind Small Woodwind Woodwind Reeds Learn More Small Starter Kit 84% Reed Kit Guitars and Bass Ukulele and Mandolin Large Bowed Inst. Small Bowed Inst. Large Woodwind Small Woodwind Woodwind Reeds Learn More 84% Reed Kit 72% Reed Kit Guitars and Bass Ukulele and Mandolin Large Bowed Inst. Small Bowed Inst. Large Woodwind Small Woodwind Woodwind Reeds Learn More 72% Reed Kit Recommended Number of Refill Packs Per Instrument or Accessory Case 49% Standard Pack 49% High Absorption Pack 49% Size 8 10 Pack 72% Size 60 Pack Do I have to use a fabric holder with Boveda in an instrument case? YES! Always insert Boveda into a Boveda Fabric Holder before placing it in an instrument case. The fabric holder extends the life of Boveda plus acts as a liquid barrier if a pack is accidentally punctured. Do I have to use a fabric holder with Boveda in an instrument case? YES! Always insert Boveda into a Boveda Fabric Holder before placing it in an instrument case. The fabric holder extends the life of Boveda plus acts as a liquid barrier if a pack is accidentally punctured. Do I tear open the brown Boveda packet? NO!!! DO NOT OPEN the brown packet itself. If your Boveda arrived individually wrapped in cellophane, remove that plastic overwrap before slipping the humidity control pack into a fabric holder. Do I tear open the brown Boveda packet? NO!!! DO NOT OPEN the brown packet itself. If your Boveda arrived individually wrapped in cellophane, remove that plastic overwrap before slipping the humidity control pack into a fabric holder. Should I use a sponge or snake with Boveda? No, do not use Boveda in the same instrument case with other humidification products, as this will reduce the Boveda’s efficiency. Ditch the sponges and hoses. No more rewetting— Boveda works automatically to balance the humidity in your case! Should I use a sponge or snake with Boveda? No, do not use Boveda in the same instrument case with other humidification products, as this will reduce the Boveda’s efficiency. Ditch the sponges and hoses. No more rewetting— Boveda works automatically to balance the humidity in your case! I live in a really humid place, so do I need Boveda in my instrument case? Yes! Boveda makes a High-Absorbency pack to protect wood instruments in extreme humidity, prevent warping and curb humidity fluctuations when you’re in a dry environment, like an airplane or air-conditioned venue. I live in a really humid place, so do I need Boveda in my instrument case? Yes! Boveda makes a High-Absorbency pack to protect wood instruments in extreme humidity, prevent warping and curb humidity fluctuations when you’re in a dry environment, like an airplane or air-conditioned venue. What’s the difference between the Large and Small Starter Kits? The Large Starter Kit is the right Boveda for an acoustic guitar, large woodwind or large bowed or fretted instrument. Choose a Small Starter Kit to use Boveda with an electric guitar or bass, small woodwind or small bowed or fretted instrument. What’s the difference between the Large and Small Starter Kits? The Large Starter Kit is the right Boveda for an acoustic guitar, large woodwind or large bowed or fretted instrument. Choose a Small Starter Kit to use Boveda with an electric guitar or bass, small woodwind or small bowed or fretted instrument. Review: Way too expensive! - I like the idea of protection of my instruments, but what I don’t understand is why these are sold separately from the humidity control packs. If they are an essential component of the system, why are they $10 a pop. The price is near double their competitors who sell both together at near half the price. Caveat emptor. Review: Humidity pack holder - These humidity packs work great in my guitars. Delivery was excellent. ## Features - ORDER AN EXTRA BOVEDA FABRIC HOLDER to use with Boveda, the global leader in 2-way humidity control for wooden instruments - DOUBLE-SLEEVE SADDLEBAG holds two (2) 49% RH Boveda Size 70 (sold separately) to precisely achieve and maintain between 45% and 55% RH—the safe zone for wood instruments. Drapes over strings and into the sound hole - FOR MUSICIANS WHO PLAY MULTIPLE INSTRUMENTS, including acoustic guitars and basses; guitarróns; violoncellos; double basses; bass clarinets; and bassoons - FOR MUSIC RETAILERS AND REPAIR SHOPS that sell and service large fretted, bowed and wooden woodwind instruments - ALWAYS use a protective leak-resistant Boveda Fabric Holder with Boveda (not included) for maintenance-free humidity control in an instrument case ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #4,004 in Musical Instruments ( See Top 100 in Musical Instruments ) #56 in Guitar Cleaning & Care Products | | Customer Reviews | 4.6 out of 5 stars 499 Reviews | ## Product Details - **Color:** Boveda brown - **Brand:** Boveda - **Material:** Fabric - **Style:** Utilitarian - **Item dimensions L x W x H:** 10 x 0.2 x 6 inches ## Images ![Double-Sleeve Fabric Holder for 49% RH | 2-Way Humidity Control for Large Instruments - Image 1](https://m.media-amazon.com/images/I/71JhiN5R9gL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Do I have to use a fabric holder with Boveda in an instrument case?** A: YES! Always insert Boveda into a Boveda Fabric Holder before placing it in an instrument case. The fabric holder extends the life of Boveda plus acts as a liquid barrier if a pack is accidentally punctured. **Q: Do I tear open the brown Boveda packet?** A: NO!!! DO NOT OPEN the brown packet itself. If your Boveda arrived individually wrapped in cellophane, remove that plastic overwrap before slipping the humidity control pack into a fabric holder. **Q: Should I use a sponge or snake with Boveda?** A: No, do not use Boveda in the same instrument case with other humidification products, as this will reduce the Boveda’s efficiency. Ditch the sponges and hoses. No more rewetting— Boveda works automatically to balance the humidity in your case! **Q: I live in a really humid place, so do I need Boveda in my instrument case?** A: Yes! Boveda makes a High-Absorbency pack to protect wood instruments in extreme humidity, prevent warping and curb humidity fluctuations when you’re in a dry environment, like an airplane or air-conditioned venue. **Q: What’s the difference between the Large and Small Starter Kits?** A: The Large Starter Kit is the right Boveda for an acoustic guitar, large woodwind or large bowed or fretted instrument. Choose a Small Starter Kit to use Boveda with an electric guitar or bass, small woodwind or small bowed or fretted instrument. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Way too expensive! *by M***Y on September 10, 2022* I like the idea of protection of my instruments, but what I don’t understand is why these are sold separately from the humidity control packs. If they are an essential component of the system, why are they $10 a pop. The price is near double their competitors who sell both together at near half the price. Caveat emptor. ### ⭐⭐⭐⭐⭐ Humidity pack holder *by R***. on June 12, 2025* These humidity packs work great in my guitars. Delivery was excellent. ### ⭐⭐⭐⭐⭐ Thin and light weight *by C***I on February 16, 2021* Must have for expensive guitars, these hold humid pacs perfectly, the packs need to be replaced every 2 months but you only need them in the winter. Low humidity is the Bane of acoustic guitars. ## Frequently Bought Together - Boveda for Music | Double-Sleeve Fabric Holder for 49% RH Boveda 2-Way Humidity Control | For Use with 2 Boveda Size 70 to Protect Large Instruments from Cracking/Warping - Boveda 49% Two-Way Humidity Control Packs for Music Instruments – 4 Pack – Standard Size – Prevents Warping & Cracking for Wooden Instruments– Humidifier Packs for Instrument Cases – Resealable Bag --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/244511537-double-sleeve-fabric-holder-for-49-rh-2-way-humidity](https://www.desertcart.jp/products/244511537-double-sleeve-fabric-holder-for-49-rh-2-way-humidity) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-20*