--- product_id: 99487127 title: "KitBrix Waterproof Gym Duffel Bag, Under Seat Cabin Bag 39x24x24 - Solid Reinforced Base - Built for Wet & Muddy Kit - Multi-Use: Swimming, Football, Camping, Travel, Triathlon Transition Bag" brand: "kitbrix" price: "¥42990" currency: JPY in_stock: true reviews_count: 9 category: "Kit Brix" url: https://www.desertcart.jp/products/99487127-kitbrix-waterproof-gym-duffel-bag-under-seat-cabin-bag-39x24x24 store_origin: JP region: Japan --- # 100% waterproof TPU-laminated nylon Modular zip-together system for multi-bag combos Patented BaseBrix reinforced waterproof base KitBrix Waterproof Gym Duffel Bag, Under Seat Cabin Bag 39x24x24 - Solid Reinforced Base - Built for Wet & Muddy Kit - Multi-Use: Swimming, Football, Camping, Travel, Triathlon Transition Bag **Brand:** kitbrix **Price:** ¥42990 **Availability:** ✅ In Stock ## Summary > 💼 Elevate your game with the ultimate waterproof, modular gym & travel bag! ## Quick Answers - **What is this?** KitBrix Waterproof Gym Duffel Bag, Under Seat Cabin Bag 39x24x24 - Solid Reinforced Base - Built for Wet & Muddy Kit - Multi-Use: Swimming, Football, Camping, Travel, Triathlon Transition Bag by kitbrix - **How much does it cost?** ¥42990 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/99487127-kitbrix-waterproof-gym-duffel-bag-under-seat-cabin-bag-39x24x24) ## Best For - kitbrix enthusiasts ## Why This Product - Trusted kitbrix brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Military-inspired BaseBrix base delivers unmatched durability and stability. - • **Customizable Carry:** Zip together multiple bags to create your perfect gym, travel, or triathlon setup. - • **Effortless Clean-Up:** Wipe-clean surfaces inside and out mean no more soggy, smelly kit. - • **Travel-Ready Compact:** Fits under airplane seats with lightweight 1.3kg design for seamless carry-on convenience. - • **Weatherproof Warrior:** Keep your gear bone dry and mud-free no matter the conditions. ## Overview The KitBrix Waterproof Gym Duffel Bag is a 20-litre, ultra-durable sports and travel companion featuring a patented waterproof BaseBrix base, modular zip-together design, and wipe-clean TPU-laminated nylon construction. Compact and lightweight at 1.3kg, it fits under airplane seats and is trusted by athletes for organizing wet and muddy gear across multiple sports and outdoor adventures. ## Description KitBrix can be used to keep all your kit bag essentials in one place and available whether in the car, a home or at the gym. The KitBrix bag wipe-free tarpaulin will ensure the boot of your car remains clean and tidy despite you filling your KitBrix with the muddiest kit possible. Review: Get one, best there is. - These bags are amazing, really good quality, I've done loads of tough mudders and spartan races, this is the go to for your kit. Review: Excellent purchase! - Bought for working in the film & tv industry serving as a kit bag. Excellent quality, comfortable to wear. I love the option to add on another bag to it and change how you wear it. It fitted everything I needed. I love the colour, appearance and the zip function is great. Fantastic value for money. ## Features - MULTI-USE KIT BAG FOR SPORTS, TRAVEL & OUTDOOR ADVENTURE – The KitBrix waterproof sports bag protects your gear in all weather conditions. Perfect as a football kit bag, rugby bag, PE bag, or as a small cabin bag for trips. Carry with the ergonomic handle or as a shoulder bag with the detachable strap. Also ideal as a small gym bag for men and women. - EXCLUSIVE BASEBRIX ENGINEERING: REINFORCED WATERPROOF BASE – Built to last with maximum durability, the KitBrix duffle bag features our patented BaseBrix waterproof base for ultimate strength and stability. This indestructible sports bag is the only travel bag, gym bag, or football bag you’ll ever need. Trusted by athletes for its rugged, military-inspired design. - MODULAR ZIP-TOGETHER DESIGN FOR ULTIMATE ORGANISATION – Connect multiple KitBrix bags for a modular system to organise kit by sport or separate wet and dry gear. Join two bags to form a backpack, or connect three for the ideal triathlon transition bag. FREE ACCESS to our downloadable checklists for a range of sports events to help keep you organised and race-day-ready. - EASY TO WIPE CLEAN: PERFECT FOR MUDDY GEAR – Crafted from water-resistant TPU-laminated nylon with wipe-clean surfaces inside and out, the KitBrix is ideal for muddy outdoor sports. The waterproof BASEBRIX allows you to place it on wet pitches, lakeside mud, or grassy fields. Stands upright on any surface for easy access. - UNDER-SEAT CABIN BAG, IDEAL FOR TRAVEL – Light and compact, the KitBrix fits under the seat of an aeroplane and can be used as an under seat cabin bag. Its dimensions (39 x 24 x 24 cm) and weight (1.3kg) make it a lightweight carry on bag. Whether you’re heading to the gym, a race, or a weekend away, it’s the perfect all-in-one solution. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07J1RBJ9C | | Best Sellers Rank | 102,178 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 550 in Sports Duffels | | Brand Name | KitBrix | | Capacity | 20 litres | | Closure Type | Zipper | | Colour | Black (Single) | | Customer Reviews | 4.5 out of 5 stars 73 Reviews | | Handle Type | Web Handle | | Item Dimensions L x W x H | 39L x 24W x 14H centimetres | | Item Weight | 1.3 Kilograms | | Manufacturer | KitBrix | | Manufacturer Part Number | KB-GEN-BLACK-ICON | | Material Type | Plastic | | Model Name | Kb-gen-black-icon | | Model Number | Kitbrix | | Number of Compartments | 1 | | Number of Items | 1 | | Number of Packs | 1 | | Recommended Uses For Product | Sports, Travel, Outdoor Activities | | Size | One Size | | Strap Type | Shoulder | | Style Name | Kitbrix Bag with icons | | Unit Count | 1 Count | | Water Resistance Level | Waterproof | ## Images ![KitBrix Waterproof Gym Duffel Bag, Under Seat Cabin Bag 39x24x24 - Solid Reinforced Base - Built for Wet & Muddy Kit - Multi-Use: Swimming, Football, Camping, Travel, Triathlon Transition Bag - Image 1](https://m.media-amazon.com/images/I/71oFl-F5blL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Are the KitBrix bags the same apart from colour?** A: Yes! The KitBrix bags have been designed to be exactly the same apart from colour. The same structure allows the bags to be zipped together for easy travel and to be carried in rucksack form. **Q: What do I actually get when I order a KitBrix bag?** A: When you order your KitBrix bag, you will receive a strap that can be used in a number of locations on the bag, icons that can be inserted in the outside of your KitBrix, PLUS if you get a second KitBrix you can use the two straps to form a rucksack! **Q: Is the KitBrix bag waterproof?** A: The base of the bag is waterproof, the bag itself is water resistant to exceptional levels but because the zippers interlink we are not able to 100% claim the bag is waterproof…nearly though! **Q: Are the straps adjustable?** A: Yes. The strap has an 8” adjustability strap that is padded for comfort. Some people prefer to take off the outer overwrap and use the less bulky single nylon strap. **Q: What is your approach to sustainability?** A: Our approach to Sustainability is centred around creating robust and long-lasting bags. Our bags and accessories have been carefully designed to be able to withstand the harshest of treatment, brutal weather conditions and the toughest terrain ## Customer Reviews ### ⭐⭐⭐⭐⭐ Get one, best there is. *by B***E on 1 September 2026* These bags are amazing, really good quality, I've done loads of tough mudders and spartan races, this is the go to for your kit. ### ⭐⭐⭐⭐⭐ Excellent purchase! *by S***H on 14 April 2026* Bought for working in the film & tv industry serving as a kit bag. Excellent quality, comfortable to wear. I love the option to add on another bag to it and change how you wear it. It fitted everything I needed. I love the colour, appearance and the zip function is great. Fantastic value for money. ### ⭐⭐⭐⭐ Quality *by J***W on 20 September 2025* Well made and look tough ## Frequently Bought Together - KITBRIX Gym Bag, Duffel Bag, Personal Item Travel Bag - Solid Waterproof Base - Built for Wet, Muddy Gear - Multi-Use Swim Bag, Soccer Bag, Wrestling Bag, Camping Bag, Triathlon Transition Bag - KitBrix Sports & Outdoor Changing Mat - Soft Microfiber Keeps Feet Dry - Triathlon Gear - Wetsuit Changing Mat for Swimming, Surfing, Triathlon Transition - Camping Essentials & Beach Accessories - KitBrix Microfiber Towel for Sports & Travel - Quick Dry Towel for Swimming, Gym, Beach & Camping - Highly Absorbent & Lightweight Microfibre - Travel Essentials & Camping Accessories --- ## 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/99487127-kitbrix-waterproof-gym-duffel-bag-under-seat-cabin-bag-39x24x24](https://www.desertcart.jp/products/99487127-kitbrix-waterproof-gym-duffel-bag-under-seat-cabin-bag-39x24x24) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-26*