Ice-Watch Yellow Sili Forever Unisex Watch SI.YW.U.S.09. These watches are the latest must have fashion accessories for both men & women. The Sili Forever watches with silicone straps make the unisex Sili Forever Collection very comfortable & light on the wrist. The Unisex Ice Sili SI.YW.U.S.09 watch is part of the Ice Watch Sili Forever Collection & is available in a wide range of colours. As seen on The Saturdays in their new video – Missing You.