Polyethylene terephthalate forms the basis for synthetic fibers like Dacron, Terylene and polyester. Its belts were made from Terylene (now known as PET) made by ICI. Polyester (Terylene) is stronger but less elastic than nylon. Crimplene is a texturised continuous fibre launched in 1959, produced by modifying Terylene. Increasingly used were easy-care synthetic fabrics such as Crimplene, Dacron and Terylene. The new polymer was later developed into the synthetic textile fibre Terylene by ICI. Other trade names include Terylene, Tetoron, Trevira and Diolen. Garland continued to act as an advisor to industry, working with Terylene and knitwear manufacturers. The catamarans had modern Dacron sails, Terylene stays and sheets with modern roller blocks. ICI (Terylene) and DuPont (Dacron) went on to produce their own versions of the fibre. An alternative reason for the name chosen is that is crimped (i.e. bulked up) Terylene. Other discontinued materials include ox cartilage, Terylene wool, ground rubber, silastic rubber, and teflon-silicone prostheses. Other discontinued materials include ox cartilage, Terylene "wool", ground rubber, silastic rubber, and teflon-silicone prostheses.