Apple Watch Solo Loop (Northern Lights, 45 mm, Size 12, Spring 2025)

The Solo Loop Apple Watch band was released in 2020 along with the Apple Watch Series 6. The packaging describes this product as a “Silicone Fitted Band.” According to Apple’s website:

“Made from liquid silicone rubber, the Solo Loop features a unique, stretchable design with no clasps, buckles, or overlapping parts that’s ultracomfortable to wear and easy to slip on and off your wrist. Each band is specially treated with UV to give the band a silky, smooth finish. It’s also swim proof and sweat proof so it can go just about anywhere you want to wear it.”

The color of this band is Northern Lights, a shade of bright green (almost neon). The color was very close to the Sprout Green Solo Loop from Spring 2023, as pictured in the accompanying photos. It was available in 41 mm and 45 mm widths, and was sold in specific wrist sizes. The 41 mm Solo Loop was sold in wrist sizes 1–9, and the 45 mm Solo Loop was sold in wrist sizes 4–12.

According to Apple’s website, “This band comes in custom sizes because it’s designed for an ultracomfortable fit. An accurate measurement will help you get the size that’s right for you.” The website allowed buyers to download a PDF and cut out a “tool” that wrapped around the wrist to designate the band size needed.

This snug-fitting design allowed Apple Watch sensors to retain constant and consistent skin contact, allowing accurate blood oxygen and heart rate measurements to be maintained.

Source: Apple, Bandbreit (Northern Lights, Sprout Green)

Unity Rhythm Sport Loop (46mm, Spring 2025)

This Sport Loop is Apple’s fifth design in the Black Unity collection. With this watch band purchase, “Apple is supporting five global organizations that focus on elements of rhythm, creativity, and community through meaningful mentorship of underrepresented artists or musicians.” The five organizations include:

  • The National Museum of African American Music
  • Art Gallery of New South Wales
  • Music Forward Foundation
  • Battersea Arts Centre
  • Ellis Marsalis Center for Music

This was the first Apple Sport Loop to use a lenticular design. Apple described the effect: “Celebrating the unifying power of rhythm, this unique band is woven together to create a beautiful depth effect. In motion, Pan-African colors of red and green shift to reveal a hint of yellow — as if by magic.” In addition, “From the beat of a heart to the flow of creativity, rhythm is a universal element of the human experience.”

This band includes a matching watch face. Apple states, “The band is complemented by the Unity Rhythm watch face, which animates to tell the time when you raise your wrist. Distinctive rhythmic chimes mark every hour and half hour.”

Like all Sport Loop bands, Apple describes the style: “Soft, breathable, and lightweight, the Sport Loop features a hook-and-loop fastener for quick and easy adjustment. The double-layer nylon weave has dense loops on the skin side that provide soft cushioning while allowing moisture to escape.”

This One Size (Fits Most) band fits 145–220mm wrists.

Sources: Apple (Unity Rhythm), Bandbreite