What materials are used in the construction of the mop head?

The mop head is made of four-ply premium yarn and has a plastic molded cap with a metal 1/4-in. threaded bolt head.

What is the design feature of the mop head that helps reduce fraying and unraveling?

The mop head features a looped-end design that lints less, reduces fraying and unraveling.

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Mop Head, Lie-Flat Head, Rayon Fiber, 24oz, White, 12/Carton

Looped-end design lints less, reduces fraying and unraveling; four-ply premium yarn. Durable double-sewn tailband prevents tangles and provides more floor coverage with each stroke. Mop head lies flat on the floor for broad coverage.
Looped-end design lints less, reduces fraying and unraveling; four-ply premium yarn. Durable double-sewn tailband prevents tangles and provides more floor coverage with each stroke. Mop head lies flat on the floor for broad coverage. Plastic, molded cap with metal 1/4-in. threaded bolt head.
Looped-end design lints less, reduces fraying and unraveling.
Four-ply premium yarn.
Durable double-sewn tailband prevents tangles and provides more floor coverage with each stroke.
Mop head lies flat on the floor.