This hydration pack is perfect for enduro races and riding. It comes standard with a military-grade Hydrapak® (3L reservoir). The thick 0.4mm material is highly durable, and the Wide Slide-Seal™ prevents leaks. The wide opening makes it easy to refill and clean. It features a large-diameter drink tube (HydraFusion™) and a twist-lock bite valve. The main and outer pockets use YKK® water-resistant zippers to prevent rain from entering. Reflectors and a 3M logo are included for small item storage and nighttime visibility. The waist strap is removable and can be connected to US-5 and US-10 packs. * There is yellowing on the silicone parts of the mouthpiece hose connection and the mouthpiece itself (photo 8). * The hydration pack has not been used for a while, and we have not confirmed whether it is currently functioning properly. Please consider this before purchasing. * To prevent problems, we do not offer exclusive listings or holds. We will prioritize the first person to purchase. * Shipping will use recycled materials. Cardboard and packing materials may be reused, so please be aware of this. This will not affect the product itself, but please be mindful if you are concerned about appearance. * This is a used item. There are small scratches and scuffs from use. Please check the photos for the condition and purchase with understanding. * If you have any concerns, please feel free to ask questions before purchasing.