Features : 

• Soft walls won't give you that hard bottle bounce, fits in pack bottle sleeves and rolls up when empty for space saving storage
• Flexible bail handle for comfortable carrying, quick attachment, and filling in a lake or river
• Twist to drink nozzle is spill-proof and features a self-sealing valve
• Compatible with most 42mm threaded water filters (ie: Katadyn BeFree), it makes an easier to fill and more durable squeeze bag in the backcountry
• Made of dual-layer, abrasion resistant TPU & RF welded seams for superior durability and elasticity
• 100% BPA & PVC free, wide working temperature range (can be frozen - max temp 60° C / 140° F)

Specs : 

• CAPACITY : 1.5 L/ 50 fl oz
• DIMENSIONS : 295 x 93 mm / 11.5 x 3.6 in
• WEIGHT : 97 g / 3.4 oz
• MATERIAL : TPU, HDPE, PP
• PACKABLE At only 97g, it packs down smaller than a deck of cards, your new thru-hiking essential
• SPILL PROOF Unique drink through cap with spill-proof valve for easy drinking and no leak-usage
• FILTER COMPATIBLE Attaches to most 42mm threaded water filters, use as your backcountry squeeze bag or drink directly through
• DURABLE Dual-layer film laminate construction adds structure and RF-welded soft walls give grip without compromising compactness