Ultralight Pack Liner

Engineered for minimalist backpackers, this ultralight pack liner delivers waterproof protection without the weight penalty. Designed to fit both 30L and 45L packs, it shields your gear from moisture while maintaining pack integrity. The streamlined construction keeps your base weight low—essential for long-distance trekking and alpine expeditions.  Pack liners are sewn and fully seam taped to maximize weather protection. If you are not sure which size you need, we would recommend going up one size, the weight penalty is negligible. Fabric options include: Dyneema CT5K.18 - The OG of UL, our lightest option, while strong for its weight it does have limitations to be considered for abrasion resistance. Best for ultralight hikers who prioritize weight, best used inside of a backpack.  Xpac UX10 - 100% fully woven Ultra-PE face material. This material is slightly heavier than Dyneema but extremely abrasion resistant. The white is semi translucent and black has a satin finish. Best for those who need more a more abrasion resistant fabric, great for inside or outside the pack or bikepacking.  UltraTX - an economical middle ground between Dyneema and UX10. Best used inside or outside of a pack.  Not sure which material is right for you?  Click here for more information! Other Materials used - UltraTnT PSA Taped Seams Nylon Webbing Duraflex Buckle Dimensions and weights by size include: 30L- 24X17.5X4 - 1.7oz/47g (65- UltraTX and UX10) 45L - 27X17.5X6 - 1.8oz/52g (70g-UltraTX and UX10)