GlowSack – The Cheekiest Bike Tail Light
- Soft silicone light that glows bright red from inside
- Press once for steady, double-press for flash
- Loops under any saddle in seconds, no tools
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🚚 Free worldwide shipping • ↩️ 14-day returns • 🔒 Secure checkout
Hang 'em under your saddle. Give 'em a squeeze. Watch 'em glow. 🔴
GlowSack is the cheeky rear bike light that gets you seen and gets everyone laughing. Drivers can't miss it. Your mates won't stop talking about it.
- 🔴 Bright red glow: press once for steady, twice for flashing
- 🍆 Soft white silicone: squishy, tough and properly ridiculous
- ⚡ Fits in seconds: the stretchy strap loops under any saddle, no tools
- 🎁 The gift sorted: Secret Santa, Christmas or birthdays for the cyclist or biker in your life
- 🚚 Free worldwide shipping on every order
🎅 Christmas is coming. Order early so it arrives in time.
Everything you need to light up
No tools, no fiddly brackets, no app. Loop it on and ride.

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1 × GlowSack tail light
Soft white silicone, glows bright red when it’s on.
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Built-in strap loop
Hooks under your saddle or onto a bag. Nothing to screw on.
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Two light modes
Steady red, or flashing so you’re seen from further back.
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Free worldwide shipping
Ships with tracking. UK usually 7–12 working days, the rest of the world can take a bit longer.
Loop. Squeeze. Ride.
Takes about ten seconds. Then every car behind you gets the joke.
Loop it on
Hook the strap under the back of your saddle. Done in seconds, fits any bike.
Squeeze it
Press once for a steady red glow, double-press to flash.
Ride
Be seen, get laughs, and watch drivers do a double take.
Frequently Asked Questions
How long does delivery take?
Free worldwide shipping on every order. UK orders usually arrive in 7–12 working days, international orders can take a bit longer. You’ll get a tracking link by email.
Will it fit my bike?
Yes. It hangs from a stretchy silicone loop that goes under the back of almost any saddle, or onto a bag or seat post.
How do I turn it on?
Squeeze the button once for a steady red glow. Double-press for flash mode.
Is it a proper bike light?
It’s a fun extra rear light that makes you more visible. Keep using your road-legal lights too — GlowSack is the cheeky bonus.
What if I don’t like it?
You’ve got 14 days to return it. If it arrives faulty we’ll replace or refund it, no need to send it back.
Make every car behind you laugh.
One squeeze and your bike has the cheekiest light on the road. Perfect stocking filler for the cyclist who has everything.
Get my GlowSackFree worldwide shipping · 14-day returns · Secure checkout