The YY Vertical Alien 5 Pack is a set of five finger extensor resistance bands for training the muscles climbing forgets. Pulling on holds all day strengthens your flexors; the Alien works the extensors and forearm antagonists that keep tendons balanced and joints healthy.

Slip your fingertips into the loops and open your hand against the band. Thirty seconds a day is a habit worth building, and the Alien is small enough to keep in a chalk bag or crag pack so you actually do it. Each pack holds five identical bands in one resistance level: green for an easy warm-up squeeze, blue for regular conditioning, orange for serious extensor strength work.

Why you'll love it

• Targets the antagonists – finger extensors and forearm muscles that pulling never touches
• Three resistances – green (easy), blue (medium) and orange (hard), colour-coded so you can progress
• Five per pack – one for the chalk bag, one for the desk, and spares
• Compact – ideal for warm-ups, cool-downs and rehab routines anywhere

Good to know

• Each pack contains five identical bands in a single resistance level
• Choose Green (Easy), Blue (Medium) or Orange (Hard)

Who it's for

Climbers of every level who want a simple injury-prevention tool. Start with green if you've never trained extensors, then move to blue and orange as your hands adapt.