When larger evidence collection containers are not necessary, Sirchie 5x7.5" Preprinted Evidence Envelope (100 Set ) is perfect. The white color provides a contrasting background for evidence contained within. It is great for hairs, fibers and fragments of all types. It is preprinted with all the appropriate information. Simply moisten to seal or use any of Sirchie's SM100 series "Shorts" seals.