Cov hnab ntim khoom sab nraum zoov tuaj nyob rau hauv ntau hom thiab specifications kom haum rau cov kev xav tau sib txawv. Raws li cov duab, cov kev xaiv muaj xws li duab plaub, square, thiab round designs. Peev xwm ntawm tsuas yog ob peb litres mus rau ob peb kaum los yog ntau tshaj ib puas liters. Functionally, muaj ntau hom tsim los yooj yim waterproofing, nrog rau cov uas muab plua plav- pov thawj los yog tsim kua muag- muaj peev xwm tiv taus. Tsis tas li ntawd, qee lub hnab muaj cov haujlwm tshwj xeeb- xws li rwb thaiv tsev thermal, cia txias, lossis tiv thaiv UV- kom ua tau raws li qhov xav tau ntawm ntau yam xwm txheej.
Cov hnab ntim dej tsis sib haum (yob- sab saum toj lossis cua- valve styles): Cov yam ntxwv no yog yob- kaw sab saum toj lossis ib qho - cua valve, tso cua kom tshem tawm ntawm tus kheej kom txo ntim. Feem ntau yog ua los ntawm 15D–210T nylon lossis PU- cov ntaub coated, lawv muaj qhov ntsuas dej tsis zoo (2000mm+) thiab yog tsim los khaws cov khoom loj xws li cov hnab pw tsaug zog thiab cov tsho hauv qab, tiv thaiv lawv ntawm cov dej noo thaum txuag lub hnab ntim khoom.
Drawstring hnab: Cov no feature ib qho yooj yim tsim qhov twg qhib yog cinched kaw nrog ib tug drawstring. Lawv tuaj nyob rau hauv breathable mesh versions (tsim rau khau ntub dej los yog qias neeg ntxhua khaub ncaws) thiab thickened waterproof versions (rau kev tiv thaiv plua plav thiab ya raws). Cov ntaub ntawv muaj xws li Oxford daim ntaub, mesh ntaub, los yog PE; thaum lub teeb yuag thiab portable, lawv tsis yog tag nrho airtight.
