1. Kev khi lub mis, tiv thaiv kev poob siab, kev ua kis las tsis muaj siab
2. Mos thiab tawv-phooj ywg, sai qhuav thiab breathable
3. Siab elasticity, dav duav foob, tsis muaj strangulation
4. Ua kom qhov qis qis, ruaj khov hauv siab zoo, txiav lub duav
5. Widened lub xub pwg straps, disperse siab, qhwv lub sab mis
6. Ib daim molding, ruaj tsim
7. Precise positioning, yooj yim rau muab tso rau thiab tshem tawm