What does "secure" mean in this passage? to feel safe to slide down to fasten firmly to hold lightly
To prepare for the slippery slide down, rider put on a soft helmet and some arm pads. Then they lie on a mat.The mat has a pocket for their feet and a strap to hokd as they slide. Worckers can't SECURE, or attach; the mat to the rider, so riders must hold that strap tightly all the eay down.
