Origins

#HeatlessCurls exploded on TikTok during the COVID-19 pandemic (May 2020) as people sought damage-free hair styling at home. The trend popularized overnight curl techniques using bathrobes, socks, or specialized curl rods — no curling iron, flat iron, or heat required.

Popular Methods

Bathrobe Belt Method:

• Place robe belt on head like headband
• Wrap small sections of damp hair around belt
• Sleep overnight, unwrap in morning
• Result: Loose, beachy waves

Sock Curls:

• Tie sock in donut shape at hair ends
• Roll hair up to scalp
• Sleep, unroll in morning
• Result: Spiral curls

Curl Rod/Heatless Curling Set:

• Commercial products (Curlformers, heatless curl rod sets)
• Wrap damp hair around rods
• Sleep 6-8 hours
• Result: Defined curls

Viral Moments

May 2020: TikTok creator @hellosydneymay posted bathrobe curl tutorial (15M+ views) Summer 2020: #HeatlessCurls accumulated 500M+ views 2021: Commercial heatless curl products flooded Amazon, Target 2022: @oliviahalfhidden’s curls using DIY sock method (10M+ views)

Key Products

DIY:

• Bathrobe belt (free, already owned)
• Socks, t-shirts, leggings (repurposed)
• Scrunchies, hair ties

Commercial:

• Curlformers ($20-$40, plastic spiral rods)
• Kitsch Satin Heatless Curling Set ($15, viral on TikTok)
• Drybar Wrap Party Rollers ($35)

Cultural Context

Heatless curls resonated because:

• Pandemic hair care: Salons closed, DIY grooming surge
• Damage repair: Years of heat styling damage, desire for healthy hair
• Overnight convenience: Sleep in curlers, wake up styled
• Cost-effective: Free/cheap methods vs $100+ curling irons

Celebrity Adoption

• Hailey Bieber: Shared heatless curl routine (Instagram Stories, 2021)
• Olivia Rodrigo: Mentioned using heatless curls (interview, 2021)
• Madison Beer: TikTok heatless curl tutorial (2020)

Economic Impact

Product sales (2020-2022):

• Kitsch Heatless Curling Set: Sold out repeatedly on Amazon, Target
• Google searches for “heatless curls” increased 400%+
• Traditional curling iron sales declined 15% (NPD Group, 2021)

Criticisms

• Time-consuming: Requires 6-8 hours (overnight)
• Uncomfortable sleep: Sleeping in curlers, belts awkward
• Results vary: Hair type, texture affect outcome (fine hair may not hold)
• Not truly “heatless”: Still use blow dryer on low to set curls faster

Hair Type Considerations

Works best for:

• Fine to medium hair (holds curl easily)
• Slightly damp hair (not soaking wet or dry)
• Longer hair (shoulder-length+)

Challenges for:

• Thick, coarse hair (may need heat to set)
• Short hair (not enough length to wrap)
• Very straight hair (curls may fall out quickly)

Evolution

By 2022-2023:

• Heatless waves: Looser, beachy version
• Heatless blowout: Silk wrap overnight for smooth, straight hair
• Hybrid methods: Heatless overnight + low heat touchup in morning

Related Trends

• Curly Girl Method (2019+): Natural curl care, no heat/sulfates/silicones
• Hair Oiling (2021): Pre-style treatment (coconut, argan oil)
• Silk Pillowcases (2020): Reduce frizz, hair breakage
• Rice Water Hair (2020): K-beauty-inspired hair growth trend

Sources

• @hellosydneymay TikTok - Bathrobe curl tutorial (May 2020, 15M+ views)
• Allure - “Heatless Curls Are TikTok’s Favorite Pandemic Hair Trend” (June 2020)
• NPD Group: Curling iron sales data (2020-2021)
• Google Trends: “Heatless curls” search data (2020-2023)