請問一下，ti tech 有過哪些安全等級阿?兩頂的差別是在材質上，還是只有通風系統和頭形不同而已?
GP-Tech
Shell SSL (Super-Super-Light) Karbon-Kevlar construction.
Fabrics Cool Max with hygienic treatment
Inside padding Fully removable and washable (including neckroll)
Visor Clear, flat, anti-scratch and anti-fog polycarbonate Race X visor with tear-off system
Shield Mechanism XQRS (Extra Quick Release System): shield replacement without tools in few seconds
Retention System Double D
Number of shells 3 shell sizes
Ventilation System IVS (Integrated Ventilation System) with channels hollowed directly in the shell
Ti-Tech
Shell SSL (Super-Super-Light) Karbon-Kevlar construction.
Number of shells 2 shell sizes
Ventilation System IVS (Integrated Ventilation System) with pure titanium air intakes (Titanium Technology) and channels hollowed directly in the shell
Fabrics Cool Max with hygienic treatment
Inside padding Fully removable and washable (including neckroll)
Neckroll Perspirant neckroll
Visor Clear, flat, anti-scratch and anti-fog polycarbonate Race visor with tear-off system
Retention System Double D
Shield Mechanism XQRS (Extra Quick Release System): shield replacement without tools in few seconds
歸納出一些重點：
1.帽體材質相同都是SSL，碳纖維+功夫龍
2.內襯都是CoolMax材質
3.全可拆內襯(包括頸襯)
4.鏡片快拆系統相同都是XQRS
5.都配有抗刮防霧鏡片
6.Ti-Tech多了鈦片的進排氣孔(廢話
)7.GP-Tech有三種帽殼大小，Ti-Tech只有兩種對應
8.Ti-Tech有特別標示他的是止汗頸襯
總結：其實就外型跟通風不同，小細節上的不同(請詳見板上開箱文)
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