BECCA jump in

BECCA jump in from MAC Jeans is a women's pull-on trouser in bistretch, worn on an elasticated waistband with no zip or button fastening.

A bistretch gives in two directions rather than one, so the fabric follows the body lengthwise as well as across. That is exactly what a trouser without a fastening needs: the waist stretches enough to pull on, and the material moves with you instead of holding you in one position.

Jump in is MAC's pull-on construction, which leaves the front of the trouser uninterrupted by a zip or a button and makes it quick to put on. Silver shadow melange is the single colourway, a mottled grey that gives the surface some depth, and the waist range runs from 32 to 46.