1. Kev tiv thaiv kab: Los ntawm kev txhim kho cov hlua khi rau ntawm qhov rais, qhov sib txawv ntawm lub qhov rais thav duab thiab phab ntsa yuav luag xoom, uas tuaj yeem cais cov kab ya sab nraud los ntawm kev nkag mus rau hauv chav.

2. Kev tiv thaiv plua plav: tib lub hauv paus ntsiab lus ntawm kev tiv thaiv kab, qhov twg tsis muaj qhov khoob ntawm lub qhov rais thav duab thiab phab ntsa, yuav ua li cas cov plua plav nkag mus rau hauv?

3. Waterproof: Cov dej tee dej nkag mus rau hauv chav feem ntau yog los ntawm ntau qhov sib txawv, thiab lub sealing sawb tiv thaiv ntau qhov khoob ntawm lub qhov rais, tiv thaiv dej los nag.

4. Lub suab rwb thaiv tsev: Cov khoom siv ntawm lub sealing sawb muaj lub suab rwb thaiv tsev zoo, thiab nrog kev ploj ntawm qhov rais qhov khoob hauv lub sealing sawb, cov suab nrov sab nraud yog thaiv sab nraud.Yog tias muaj qhov sib txawv ntawm qhov rooj zawv zawg thiab qhov rais, nws yooj yim los tsim cov suab nrov cua thaum cua los ntawm lawv;Kev ua haujlwm ntawm cov ntaub plaub yog ua kom tsis txhob thiab sau cov qhov khoob, ua rau lub sealing thiab suab rwb thaiv tsev nyhuv ntawm cov khoom zoo dua.