View Our Chair Fitting Form - Click Here

Stand comfortably all day with active support — the Sitmatic CoolLean is the modern ergonomic perch stool designed to reduce standing fatigue, improve posture, and support healthy movement at standing desks. Trusted by ergonomic specialists, this innovative perch seat lets you alternate between standing and supported sitting, giving your legs relief while maintaining an active, engaged posture.

Why You'll Love It:

• Reduces standing fatigue and leg pain — Provides partial weight support while maintaining an upright posture, allowing you to stand longer without the exhaustion and discomfort of prolonged standing
• Perfect for standing desk users — Designed specifically for sit-stand workstations, enabling you to perch comfortably at standing height without fully sitting down
• Promotes active sitting and movement — Encourages micro-movements and core engagement, keeping your body active and energized rather than static and sedentary
• Improves posture and spinal alignment — Tilted seat design naturally positions your pelvis forward, aligning your spine and reducing lower back strain
• Sleek, modern design fits any workspace — Contemporary aesthetics and compact footprint complement modern offices without cluttering your workspace

Dimensions:

• Model# COL12ST (Smaller Seat): Seat height 16¾"–23½" | Seat Pan: 19"W x 18"D | Backrest: 19"W x 15"H
• Model# COL12ST (Standard Seat): Seat height 16¾"–23½" | Seat Pan: 21"W x 19"D | Backrest: 19"W x 15"H

Specifications:

• Type: Ergonomic perch stool for standing desks
• Height adjustment: Adjustable to accommodate various standing desk heights
• Seat design: Tilted perch seat for active sitting posture
• Construction: Durable materials for daily use
• Ideal for: Standing desk users, sit-stand workstations, active work environments
• Manufacturer: Sitmatic (ergonomic seating specialists)

Backed by 30+ years of ergonomic expertise, Ask Ergo Works recommends the Sitmatic CoolLean for standing desk users who experience leg fatigue, people transitioning to standing desks, and anyone seeking to add movement and variety to their workday.

Perfect for:

• Standing desk and sit-stand workstation users
• People experiencing leg fatigue or foot pain from prolonged standing
• Workers transitioning from sitting to standing desks
• Active professionals who want movement throughout the day
• Modern offices and home workspaces

Free shipping included. Expert ergonomic guidance provided.

⚠️ Made-to-Order: Each chair is made-to-order based on your selections to ensure the best fit and performance. Because of this, orders are final—but we're here to help you get it right.