What closure types work best for keeping pillows secure?

For keeping pillows secure, there are three main closure types, each with distinct advantages for pillow security and convenience:

Security Comparison:

• Zipper closures offer the most secure fit, completely encasing the pillow and preventing it from slipping out during sleep
• Envelope closures provide good security while allowing easy pillow removal and insertion
• Hidden zippers combine maximum security with aesthetic appeal, keeping the closure out of sight

For toddler pillowcases specifically, envelope closures are often preferred as they’re safer (no zipper teeth) and easier for quick changes, while still keeping pillows adequately secured.