TY81 is the best choice for longer-term applications (over 4 hours) where you need non-hazardous splash protection; TY81 was DuPont's first suit offering, and is commonly used in agriculture, wastewater treatment facilities, pharmaceutical manufacturing, construction, and other work environments. TY81 suits are not recommended for semiconductor applications. Please note that any suit will eventually weaken over time with use no matter what the material it is made out of. These times are estimated average life spans of the actual suit.