Friendly reminder: to enhance the stability of the bottom-mounted attachments, we've upgraded the bottom elastic cord to a webbing-adjusted attachment. please note that both versions will be shipped randomly, and the actual product received shall govern. Hikeman Multi-functional Chest Pack - UHMWPE for Cycling, Camping, Hiking& Travel Specification: Dimensions: 26 x 13 x 10 cm (10.2" x 5.1" x 3.9") Weight: 163g (Ultra-lightweight) Material: UHMWPE Capacity: 2L Waterproof Rating: PU 2400mm Ideal For: Outdoor, Camping, Cycling, Travel, Mountaineering, Hiking. Key Features: 1.SBS waterproof zippers 2.Honeycomb ventilated back panel, effectively dissipates heat and sweat 3.Quick-release adjustable buckle, detachable strap buckles (doubles as backpack expansion clips) 4.Versatile Wearing Styles: Easily adapts as Chest Pack / Waist Pack / Sling Bag / Rear Mount / Backpack Attachment. 5.Bottom Attachment Straps: Securely carry items like umbrellas, camera tripods, or 500ml water bottles externally, freeing up main space. 6.UHMWPE material offers superior scratch/abrasion resistance lighter weight.