Heat Wave by Red Heart
Heat Wave is a brand new revolutionary yarn from Red Heart. It is making its debut this summer getting us ready for the cool months to come. Learn more about this amazing yarn and why you will want to knit and crochet all of your winter gear with this yarn that is designed to keep you warmer.
*This post contains affiliate links. By clicking on one of these links and making a purchase a portion will go to the blog. The price you pay will not change and the small commission I receive helps me to keep brining you free content and giveaways on the blog. Thank you for your continued support.*
The Facts About Heat Wave
Heat Wave is a revolutionary yarn that is activated by sunlight, even on a cloudy day, to keep you up to 12°F warmer. Upgrade your outdoor gear and stay warm at sporting events, everyday outside activities or even walking your dog. Made in the USA, Heat Wave features a range of 13 solids.

You won’t notice the difference while working with this yarn but when using it out in the cold weather you will feel the difference. Designed to retain heat while being worn outside, the yarn does go back to room temperature when it is no longer exposed to the UV rays.
YOU WILL NOT BURN YOURSELF WITH THIS YARN. The yarn does not get hot enough for you to burn yourself. Check out this video of the yarn in action during a demo at Creativation this year.
Purchase Heat Wave
- Content: 100% Acrylic
- Weight Category: 4 – Medium
- Weight/Yardage: 3.5oz; 190 yds(174m)
- Care: Machine wash warm, gentle cycle. Tumble dry low; do not over dry. Do not bleach. Do not iron.

5 FREE Heat Wave Patterns
Frequently Asked Questions
This Heat Wave yarn sounds amazing… how does it actually keep me warmer?
So here’s the thing… this yarn is revolutionary because it’s activated by sunlight, even on a cloudy day! It can actually keep you up to 12°F warmer. It’s perfect for upgrading your outdoor gear…
Is it safe to use… like, will I burn myself with this yarn?
Honestly… no! You will absolutely not burn yourself with this yarn. It doesn’t get hot enough to cause any burns, so you can use it with total peace of mind…
When I’m working with the Heat Wave yarn, does it feel different or bulky because of the warming technology?
Nope! You won’t notice any difference at all while you’re working with it. The magic happens when you wear it out in the cold… then you’ll feel the difference!
I love that it’s made in the USA! What kind of projects are good for this yarn?
Yes! It’s great for all sorts of outdoor gear… think hats, cowls, wristers, even sweaters for those chilly days. The page even lists 5 FREE patterns you can try…
If I want to get my hands on some Heat Wave yarn, where can I find it?
So here’s the scoop… you can purchase it online at Yarnspirations starting September 23rd. It will also be available in other stores like JOANN’s… happy crafting!
Categories: Giveaways, Product Reviews, Yarn Review





I have already made 5 hats with Heat Wave!
Hi!!! What a nice yarn.
When we will have Heat Wave in Canada…??????
We need it here 🙂
Heat Wave will be going online at Yarnspirations starting September 23rd. I am not sure if it will be going into other stores other than JOANNS but you will be able to purchase online.
This yarn will be ideal for chemo hats and for those who are unable to regulate their body temp post chemo, like my son.