--- product_id: 155102174 title: "Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set" brand: "rocky" price: "¥433" currency: JPY in_stock: false url: https://www.desertcart.jp/products/155102174-rocky-thermal-underwear-for-boys-cotton-knit-thermals-kids-base store_origin: JP region: Japan --- # Advanced moisture-wicking polyester microfibers 55% Cotton + 45% Ultra-Soft Polyester blend Medium stretch for all-day comfort Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set **Brand:** rocky **Price:** ¥433 **Availability:** ❌ Out of Stock ## Summary > ❄️ Gear Up for Winter Wins with Rocky Thermal Comfort! ## Quick Answers - **What is this?** Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set by rocky - **How much does it cost?** ¥433 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/155102174-rocky-thermal-underwear-for-boys-cotton-knit-thermals-kids-base) ## Best For - rocky enthusiasts ## Why This Product - Trusted rocky brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Premium Fabric Fusion:** Soft cotton meets ultra-soft polyester for breathable warmth and durability. - • **Stretch & Move Freely:** Medium stretch fabric adapts to every move without restriction. - • **Performance Base Layer:** Perfect for active kids—jog, bike, or play while staying dry and warm. - • **Two-Piece Essential Set:** Complete long-sleeve top and bottom for versatile layering or standalone wear. - • **Ultimate Warmth, All Day Long:** Stay cozy under any outfit or as comfy pajamas on chilly nights. ## Overview Rocky Thermal Underwear for Boys is a 2-piece base layer set crafted from a premium 55% cotton and 45% ultra-soft polyester blend. Designed with moisture-wicking microfibers and medium stretch fabric, it delivers breathable warmth and all-day comfort. Ideal for layering under casual or formal wear, or as cozy pajamas, this set keeps active kids dry and warm in cold weather. ## Description desertcart.com: Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set (Teal - XX-Small) : Sports & Outdoors ## Features - 2 PIECE SET: This Rocky cotton knit thermal underwear for boys set is designed for comfort with Polyester wicking microfibers. These boy's thermal underwear are stretchy comfortable. - WONDERFULLY WARM: Rocky's thermal underwear for boys is perfect for use underneath formal or casual attire at work or for a day out, or the thermal underwear can be worn as comfy pajamas on cold, chilly nights. - PREMIUM GRADE FABRICS: Rocky thermal underwear for boy's is made from 55% Cotton and 45% Ultra-Soft Polyester, these thermal long johns have the perfect blend of comfort, warmth, elasticity, and moisture protection. - MOISTURE WICKING: Designed to keep you dry, this long-sleeved shirt and long pants are made to be wick away sweat and other moisture, this thermal underwear for boys set will do its job no matter how active you are. - BASE LAYERS: When going out to jog, run, bike or cycle in the cold, make sure to use the rocky thermal underwear for kids set under your clothing to keep warm and cozy in freezing cold climates or bad weather. These thermal underwear are stretchy & comfortable. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CTZV73Y | | ASIN | B07CTZV73Y | | Age Range Description | Kid | | Apparel Closure Type | Pull On | | Best Sellers Rank | #1,116,440 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,129 in Boys' Pajama Sets | | Brand Name | Rocky | | Collection Name | Winter | | Color | Teal | | Customer Reviews | 4.4 4.4 out of 5 stars (1,452) | | Date First Available | February 27, 2019 | | Department | boys | | Fabric Type | 55% Cotton and 45% Ultra-Soft Polyester | | Material Type | Polycotton | | Neck Style | Crew Neck | | Package Dimensions | 9.69 x 7.87 x 1.34 inches; 7.76 ounces | | Pattern | Solid | | Size | XX-Small | | Sleeve Type | Long Sleeve | | UPC | 810829030498 | ## Images ![Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set - Image 1](https://m.media-amazon.com/images/I/315VsZmhixL.jpg) ![Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set - Image 2](https://m.media-amazon.com/images/I/410Xpqsy+4L.jpg) ![Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set - Image 3](https://m.media-amazon.com/images/I/51wd6-L++8L.jpg) ![Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set - Image 4](https://m.media-amazon.com/images/I/51aVkus4FFL.jpg) ![Rocky Thermal Underwear for Boys Cotton Knit Thermals Kids Base Layer Long John Pajamas Set - Image 5](https://m.media-amazon.com/images/I/51LorXXkLzL.jpg) ## Available Options This product comes in different **Color, Size** options. --- ## 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/155102174-rocky-thermal-underwear-for-boys-cotton-knit-thermals-kids-base](https://www.desertcart.jp/products/155102174-rocky-thermal-underwear-for-boys-cotton-knit-thermals-kids-base) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-09*