The zipper material must be "crushed" along a package's side seals. Zippers made with Soft Seal® material require less time, temperature and energy to crush, so converters achieve high quality seals without sacrificing cycle rates. Soft Seal® material improves converting efficiency and creates better looking side seals that won't leak, gap or distort.

All Fresh-Lock® zippers made with Soft Seal® material can be attached in-line using form/fill/seal technology or applied to pre-made bags.