Terms of Service

Last Updated: January 15, 2026

Agreement to Terms

Welcome to UL Sleep Calculator. By accessing or using our website at ul-sleep-calculator.com (the "Website"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, please do not use our Website.

Description of Service

UL Sleep Calculator provides a free online calculator and educational resources to help ultralight backpackers estimate their sleep system's temperature performance. Our services include:

• Sleep system temperature calculator
• Quilt layering calculator
• R-value guides and educational content
• Gear database and recommendations
• Blog articles and ultralight backpacking resources

All calculations and estimates are provided for informational and educational purposes only. See our Disclaimer for important safety information.

Acceptable Use

You agree to use our Website only for lawful purposes. You agree NOT to:

• Use the Website in any way that violates any applicable federal, state, local, or international law or regulation
• Engage in any activity that interferes with or disrupts the Website or servers
• Attempt to gain unauthorized access to any portion of the Website
• Use any automated system (bots, scrapers, etc.) to access the Website without our express written permission
• Transmit any viruses, malware, or other malicious code
• Impersonate any person or entity, or falsely state or misrepresent your affiliation with any person or entity
• Use the Website to collect or harvest personal information about other users

Intellectual Property Rights

Our Content

Unless otherwise indicated, the Website and all content, features, and functionality (including but not limited to calculators, text, graphics, logos, images, and software) are owned by UL Sleep Calculator and are protected by copyright, trademark, and other intellectual property laws.

Limited License

We grant you a limited, non-exclusive, non-transferable, revocable license to access and use the Website for personal, non-commercial purposes. You may:

• Use our calculators for personal trip planning
• Share links to our Website on social media or forums
• Reference our content with proper attribution and a link back to our Website

You may NOT:

• Reproduce, distribute, or create derivative works from our content without permission
• Remove or modify any copyright, trademark, or other proprietary notices
• Use our content for commercial purposes without authorization
• Frame or embed our Website on another website without permission

User Contributions and Feedback

If you submit feedback, suggestions, comments, or other materials to us (collectively, "Feedback"), you grant us a worldwide, perpetual, irrevocable, royalty-free license to use, reproduce, modify, publish, and distribute such Feedback for any purpose without compensation or attribution to you.

Third-Party Links and Content

Our Website may contain links to third-party websites, products, or services (including affiliate links to gear retailers). We are not responsible for the content, accuracy, or practices of any third-party websites. Your use of third-party websites is at your own risk and subject to their terms and conditions.

Affiliate Disclosure: We may earn commissions from qualifying purchases made through affiliate links on our Website. This does not affect the price you pay or influence our recommendations.

Disclaimer of Warranties

THE WEBSITE AND ALL CONTENT ARE PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.

We do not warrant that:

• The Website will be uninterrupted, secure, or error-free
• The results obtained from using the Website will be accurate or reliable
• Any errors in the Website will be corrected
• The Website or servers are free of viruses or other harmful components

Limitation of Liability

TO THE FULLEST EXTENT PERMITTED BY LAW, UL SLEEP CALCULATOR SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS OR REVENUES, WHETHER INCURRED DIRECTLY OR INDIRECTLY, OR ANY LOSS OF DATA, USE, GOODWILL, OR OTHER INTANGIBLE LOSSES, RESULTING FROM:

• Your use of or inability to use the Website
• Any reliance on calculations, estimates, or recommendations provided by the Website
• Any injuries, illness, or death resulting from outdoor activities undertaken based on information from the Website
• Any unauthorized access to or use of our servers or any personal information stored therein
• Any errors, mistakes, or inaccuracies in content

IMPORTANT: Outdoor activities, including backpacking and camping, involve inherent risks. See our Disclaimer for critical safety information.

Indemnification

You agree to indemnify, defend, and hold harmless UL Sleep Calculator, its affiliates, and their respective officers, directors, employees, and agents from and against any claims, liabilities, damages, losses, costs, expenses, or fees (including reasonable attorneys' fees) arising from:

• Your use of the Website
• Your violation of these Terms
• Your violation of any rights of another person or entity

Modifications to the Website

We reserve the right to modify, suspend, or discontinue the Website (or any part thereof) at any time without notice. We will not be liable to you or any third party for any modification, suspension, or discontinuance of the Website.

Changes to Terms

We may update these Terms from time to time. We will notify you of any changes by posting the new Terms on this page and updating the "Last Updated" date. Your continued use of the Website after any changes constitutes acceptance of the new Terms.

Governing Law and Jurisdiction

These Terms shall be governed by and construed in accordance with the laws of the United States, without regard to its conflict of law provisions. Any disputes arising from these Terms or your use of the Website shall be subject to the exclusive jurisdiction of the courts located in the United States.

Severability

If any provision of these Terms is found to be unenforceable or invalid, that provision shall be limited or eliminated to the minimum extent necessary, and the remaining provisions shall remain in full force and effect.

Entire Agreement

These Terms, together with our Privacy Policy and Disclaimer, constitute the entire agreement between you and UL Sleep Calculator regarding your use of the Website.

Contact Information

If you have any questions about these Terms, please contact us at:

Email: legal@ul-sleep-calculator.com

Website: ul-sleep-calculator.com