Double-Zipped Front - opens large enough to work with 4x5 or 8x10 film holder * Seams - light-sealed and double-stitched to ensure every Changing Room is light-proof to protect your film * Sleeves and Ends - are double-walled and elasticized for further light-proofing * Convenient - compact and portable darkroom can get you out of the most frustrating situations, like when your camera jams.