A way to attach the outsole and midsole to the upper body using “cement”, or more commonly: glue. Cemented shoes be found in all price ranges for most footwear types.
Vulcanization is the process for transforming natural rubber into a cured, more durable rubber. It will become less sticky and since the rubber normally melts slightly in the controlled vulcanization process, making it bond with surrounding materials. One of the most common processes to make footwear.
Direct injection is the process of introducing a molten material, commonly TPR, PVC or PU, into the cavity of a mold to achieve desired shape. One of the most common processes used in the industry
Ankle-high boot identified by the elastic on sides instead of front lacing, round toe and low heel. Also common with loops on back to grab when putting shoe on.
Ankle high boots with open lacing system and normally rounded toe box. The term Chukka boot is not describing one kind of shoe but rather a family sharing characteristics.
Open shoe with close link to ballet flat shoe in terms of design but with a characteristic strap fastened with velcro, buttons or buckle and pin over the instep point. Comes in many different heel heights, normally with a round closed toe.
EVA or ethylene-vinyl acetate, sometimes known as PEVA, poly ethylene-vinyl acetate, is a polymer based material consisting of ethylene and vinyl acetate merged together, a copolymer. EVA also popularly known as expanded rubber or foam rubber.
Tunit or resin rubber outsoles were developed in the early 1950´s with the purpose to imitate leather. With a base of vulcanized rubber made with synthetic SBR rubber reinforced with styrene resin. Normally it´s produced in sheets and cut into shape.
There are several different kind of TPEs, thermoplastic elastomers, also known as TPR, thermoplastic rubber. The most common in outsole production is SBS, Styrene-butadiene-styrene, SEBS, Styrene-Ethylene/Butylene-Styrene and TPU, thermoplastic polyurethan. Normally when TPR is mentioned it refers to SBS. TPU is widely known under it´s correct name. EVA is also a thermoplastic elastomer but is handled in a separate article.